<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css">
        .container {}
        
        .container .cart {
            width: 300px;
            /*background-color: lightgreen;*/
            margin: auto;
        }
        
        .container .title {
            background-color: lightblue;
            height: 40px;
            line-height: 40px;
            text-align: center;
            /*color: #fff;*/
        }
        
        .container .total {
            background-color: #FFCE46;
            height: 50px;
            line-height: 50px;
            text-align: right;
        }
        
        .container .total button {
            margin: 0 10px;
            background-color: #DC4C40;
            height: 35px;
            width: 80px;
            border: 0;
        }
        
        .container .total span {
            color: red;
            font-weight: bold;
        }
        
        .container .item {
            height: 55px;
            line-height: 55px;
            position: relative;
            border-top: 1px solid #ADD8E6;
        }
        
        .container .item img {
            width: 45px;
            height: 45px;
            margin: 5px;
        }
        
        .container .item .name {
            position: absolute;
            width: 90px;
            top: 0;
            left: 55px;
            font-size: 16px;
        }
        
        .container .item .change {
            width: 100px;
            position: absolute;
            top: 0;
            right: 50px;
        }
        
        .container .item .change a {
            font-size: 20px;
            width: 30px;
            text-decoration: none;
            background-color: lightgray;
            vertical-align: middle;
        }
        
        .container .item .change .num {
            width: 40px;
            height: 25px;
        }
        
        .container .item .del {
            position: absolute;
            top: 0;
            right: 0px;
            width: 40px;
            text-align: center;
            font-size: 40px;
            cursor: pointer;
            color: red;
        }
        
        .container .item .del:hover {
            background-color: orange;
        }
    </style>
</head>

<body>
    <div id="app">
        <div class="container">
            <my-cart></my-cart>
        </div>
    </div>
    <script type="text/javascript" src="../vue.js"></script>
    <script type="text/javascript">
        var cartTitle = {
            props: ['uname'],
            template: `<div class="title">{{uname}}商品</div>`
        };
        var cartList = {
            props: ["list"],
            template: `  <div>
                    <div class="item"  :key="item.id" v-for="(item,index) in list">
                        <img :src="item.img" />
                        <div class="name">{{item.name}}</div>
                        <div class="change">
                            <a href="javascript:;" @click="sub(item.id)">－</a>
                            <input type="text" class="num" :value="item.num" @blur="changeNum(item.id,$event)" />
                            <a href="javascript:;" @click="add(item.id)">＋</a>
                        </div>
                        <div class="del" @click="del(index)">×</div>
                    </div>
                </div>
              `,
            methods: {
                del(i) {
                    this.$emit('delCart', i)
                },
                add(id) {
                    this.$emit("change-num", {
                        id,
                        type: "add"
                    })
                },
                sub(id) {
                    this.$emit("change-num", {
                        id,
                        type: "sub"
                    })
                },
                changeNum(id, event) {
                    this.$emit("change-num", {
                        id,
                        type: 'change',
                        num: event.target.value
                    })

                }
            }
        };
        var cartTotal = {
            props: ["list"],
            template: `  <div class="total">
                    <span>总价：{{total}}</span>
                    <button>结算</button>
                </div>`,
            computed: {
                total() {
                    let t = 0;
                    this.list.forEach(item => {
                        t += item.price * item.num
                    });
                    return t
                }
            }

        };
        Vue.component('my-cart', {
            data() {
                return {
                    uname: '宋某某',
                    list: [{
                        id: 1,
                        name: 'TCL彩电',
                        price: 1000,
                        num: 1,
                        img: 'img/a.jpg'
                    }, {
                        id: 2,
                        name: '机顶盒',
                        price: 1000,
                        num: 1,
                        img: 'img/b.jpg'
                    }, {
                        id: 3,
                        name: '海尔冰箱',
                        price: 1000,
                        num: 1,
                        img: 'img/c.jpg'
                    }, {
                        id: 4,
                        name: '小米手机',
                        price: 1000,
                        num: 1,
                        img: 'img/d.jpg'
                    }, {
                        id: 5,
                        name: 'PPTV电视',
                        price: 1000,
                        num: 2,
                        img: 'img/e.jpg'
                    }]

                }

            },
            methods: {
                delCarts(i) {
                    this.list.splice(i, 1)
                },
                fn(val) {
                    if (val.type == 'change') {
                        this.list.some(item => {
                            if (item.id == val.id) {
                                item.num = val.num;
                                return true
                            }
                        })
                    } else if (val.type == 'add') {
                        this.list.some(item => {
                            if (item.id == val.id) {
                                item.num += 1
                                return true
                            }
                        })
                    } else if (val.type == "sub") {
                        this.list.some(item => {
                            if (item.id == val.id) {
                                item.num -= 1
                                return true
                            }
                        })
                    }


                }
            },
            template: `
            <div class="cart">
                <cart-title :uname = "uname"></cart-title>
                <cart-list :list="list" @delCart="delCarts($event)" @change-num="fn"></cart-list>
                <cart-total :list="list"></cart-total>
              
              
            </div>
        `,
            components: {
                "cart-title": cartTitle,
                "cart-list": cartList,
                "cart-total": cartTotal

            }
        })
        var vm = new Vue({
            el: '#app',
            data: {

            }
        });
    </script>
</body>

</html>